Minature rose plant named ‘KORpot020’

ABSTRACT

A new and distinct variety of rose with long lasting, novel orange-red flowers, with attractive foliage with good disease resistance. It exhibits moderate growth and a compact, upright habit. The new variety propagates well from cuttings and by grafting. This new and distinct variety has shown to be uniform and stable in the resulting generations from asexual propagation.

Latin name of genus and species: The botanical classification of the newrose plant is Rosa hybrida.

Variety denomination: The denomination of the new variety is‘KORpot020’. The new variety of rose plant of the present inventionoriginated from a controlled crossing in a breeding program of twodistinct parents during the summer of 2008. The crossing was between an‘unnamed seedling’ and an ‘unnamed seedling’.

The resulting seeds were planted in glasshouse benches during thefollowing winter. The resulting seedlings were evaluated and exhibiteddistinctive physical and biological characteristics. The new rose plantwas selected as a single plant from the seedling beds due to itssuperior characteristics and asexually propagated for furtherevaluation. This new and distinctive rose variety is named ‘KORpot020’.

CROSS REFERENCES AND FEDERAL R&D STATEMENT

There are no cross referenced or related applications. This variety wasdeveloped without the aid of any research grant.

SUMMARY OF THE INVENTION

The new rose plant may be distinguished from its seed parent, an unnamedseedling, by the following combination of characteristics:

-   -   1. The flower size of ‘KORpot020’ is medium while the flower        size of the seed parent is large.    -   2. The petal count of ‘KORpot020’ is double while the petal        count of the seed parent is semi-double.

The new rose plant may be distinguished from its pollen parent, an‘un-named seedling’ by the following combination of characteristics:

-   -   1. The bud form of ‘KORpot020’ is a long pointed ovoid while the        bud form of the pollen parent is globular.    -   2. The petal count of ‘KORpot020’ is double while the petal        count of the pollen parent is very double.

The objective of the hybridization was to create a new and distinct roseplant with unique qualities, such as:

-   -   1. Uniform growth and flowering;    -   2. Abundant attractive orange-red, recurrent flowers;    -   3. Attractive and abundant foliage; and    -   3. Excellent shelf life when grown as a floral pot rose.

This combination of qualities is not present in prior rose cultivarsknown to the inventor. These objectives have been substantially achievedand in that distinguish ‘KORpot020’ from all other varieties of which Iam aware.

As part of a rose development program, Tim-Hermann Kordes germinatedseeds from the aforementioned hybridization and conducted evaluationsand observations on the resulting seedlings in a controlled environmentin Offenseth-Sparrieshoop, Germany. The resulting seedlings exhibiteddistinctive physical and biological characteristics. The new rose plant‘KORpot020’ was selected in May 2009 from the seedling beds to beasexually propagated for further evaluation. The first asexualpropagation of ‘KORpot020’ was done by rooting softwood cuttings inJune, 2009 at the inventor's nursery in Offenseth-Sparrieshoop, Germany.

This initial and other subsequent propagations conducted in controlledenvironments demonstrate that ‘KORpot020’ reproduces true to type insuccessive generations of asexual reproduction.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying color drawing shows as true as is reasonably possibleto obtain in color photographs of this type, the typical characteristicsof the buds, sepals, reproductive organs, flowers, leaves, prickles, andstems of ‘KORpot020’.

DETAILED BOTANICAL DESCRIPTION

The following is a description of ‘KORpot020’, as observed growing inOctober, 2011 in a nursery in Jackson County, Oreg. on plants of 6months years of age. Color references are made using The RoyalHorticultural Society (London, England) Colour Chart, 2001 except wherecommon terms of color are used.

For a comparison, several physical characteristics of the rose variety‘KORoragut’, a rose variety from the same inventor described andillustrated in U.S. Plant Pat. No. 14,982 and issued on Jul. 6, 2004 arecompared to ‘KORKORpot020’ in Chart 1.

CHART 1 Characteristic ‘KORpot020’ ‘KORoragut’ Flower Diameter 50 mm50-55 mm Petal Count Approximately 18 50-60 General Tonality ofOrange-Red Group Red Group 40A open flower 33C

-   Parents:    -   -   Seed parent.—‘Unnamed seedling’.        -   Pollen parent.—‘Unnamed seedling’.-   Classification:    -   -   Botanical classification.—Rosa hybrida ‘KORpot020’.        -   Commercial classification.—Miniature rose.

FLOWER AND FLOWER BUD

-   Blooming habit: Recurrent.-   Flower bud:    -   -   Size.—Upon opening, 20 mm in length from base of receptacle            to distal end of bud and 12 mm diameter at its widest point.        -   Bud form.—Long, pointed ovoid.        -   Bud color.—As sepals first unfold, bud color is Red Group            45A. When ¼ open, the upper surface of petals is Red Group            42B, and the lower surface is Orange-Red Group 33B.        -   Sepals.—Color: Upper surface Yellow-Green Group 146D. Lower            surface Yellow-Green Group 14B. Size: Average 23-30 mm            (l)×3-5 mm (w). Shape: Strong foliaceous appendages on 2 of            the 5 sepals. Apex: Apiculate on 3 sepals and cirrose on 2            sepals. Base: Flat at union with receptacle.        -   Quantity.—Five.        -   Surface texture.—Upper side: Pubescent. Lower surface:            Pubescent.        -   Margins.—Pubescent with stipitate glands.-   Receptacle:    -   -   Surface.—Smooth.        -   Color.—Yellow-Green Group 146C.        -   Shape.—Funnel-shaped.        -   Size.—8 mm (h)×4 mm (w).-   Peduncle:    -   -   Surface.—Generally smooth with occasional stipitate glands.        -   Length.—40 to 50 mm average length.        -   Diameter.—1.5 to 2 mm average diameter.        -   Color.—Yellow-Green Group 146C.        -   Strength.—Moderately strong.        -   Borne.—Singly.-   Flower bloom:    -   -   Fragrance.—None.        -   Duration.—On the plant 12 to 15 days. Long lasting. As a cut            flower, 7 to 8 days. Senesced petals clinging.        -   Size.—Medium sized for a miniature rose. When open, the            average flower diameter is 50 mm and the average flower            height is 15 mm.        -   Form.—Shape of flower when viewed from the side: Upon            opening, upper part: Flat. Upon opening, lower part: Flat.            Open flower, upper part: Flattened convex. Open flower,            lower part: Concave.-   Color:    -   -   Upon opening, petals.—Outermost petals: Outer Side: Red            Group 46C. Inner Side: Orange-Red Group 34C. Innermost            petals: Outer Side: Red Group 43A. Inner Side: Orange-Red            Group 30B.        -   Upon opening, basal petal spots.—Basal petal spot, outermost            petals: Outer Side: Yellow Group 4A. Inner Side: Yellow            Group 2B. Basal petal spot, innermost petals: Outer Side:            Yellow Group 3A. Inner Side: Yellow Group 2B.        -   After opening, petals.—Outermost petals: Outer Side: Red            Group 46C. Inner Side: Orange-Red Group 33C. Innermost            petals: Outer Side: Red Group 43A. Inner Side: Orange-Red            Group 30B.        -   After opening, basal petal spots.—Basal petal spot,            outermost petals: Outer Side: Green-Yellow Group 1C. Inner            Side: Yellow Group 2B. Basal petal spot, innermost petals:            Outer Side: Red Group 44C. Inner Side: Orange-Red Group 32C.-   General tonality: On open flower Orange-Red Group 33C. No change in    the general tonality at the end of the 7th day. Afterwards, general    tonality is Red Group 38A.-   Petals:    -   -   Petal count.—Semi-double. Average is approximately 18 petals            under normal conditions.        -   Petal reflex.—Petals reflex strongly.        -   Petal edge.—Entire.        -   Petal shape.—Obovate. Apex shape is obtuse. Shape of base is            obtuse.        -   Petal size.—15 to 25 mm (l) 15 to 25 mm (w).        -   Thickness.—Thin.        -   Petal arrangement.—Formal.-   Petaloids:    -   -   Petaloid count.—Average of 3 to 5 per flower.        -   Petaloid size.—Petaloids are 5 to 15 mm (l) and 3 to 8 mm            (w).        -   Petaloid color.—Color of inner side is Orange-Red Group 32C.            Color of outer side is Red Group 44C.        -   Petaloid texture.—Average.        -   Margins.—Undulated.        -   Petaloid shape.—Oblanceolate. Apex: Obtuse to irregular.            Base: Attenuate.-   Reproductive organs:    -   -   Pistils.—Approximately 14 to 18 present. Stigmas: Location:            Slightly inferior in position to anthers. Color: Greyed-Red            Group 182B. Styles: Length: About 3 mm long. Color:            Greyed-Orange Group 176B.        -   Stamens.—Approximately 30 to 40 on average and regularly            arranged. Anthers: Size: About 1 mm long. Pollen: Generally            present. Color: Greyed-Orange Group 163C. Filaments: Color:            Yellow-Orange Group 15C. Length: About 5 to 6 mm.

THE PLANT

-   Growth: Moderately vigorous.-   Plant habit: Compact and upright habit. When grown as 13 cm    container plant the average plant height is 30 cm and the average    plant width is 20 cm.-   Stems:    -   -   Stem color.—Juvenile wood: Yellow-Green Group 144B. Mature            wood: Yellow-Green Group 146B.        -   Stem surface.—Juvenile wood: Smooth. Mature wood: Smooth.-   Prickles: Present.    -   -   Incidence.—Average of 2 to 3 per each 10 cm of stem.        -   Size.—Average length: 3 to 5 mm.        -   Color.—Immature prickles: Green-Yellow Group 1C. Mature            prickles: Green-Yellow Group 1C. Senescing to Greyed-Brown            Group 199A.        -   Shape.—Linear.-   Leaves and leaflets: Normally 5 leaflets on normal leaves in middle    of the stem.    -   -   Venation pattern.—Pyramidal net pattern.        -   Leaf size.—Average 90 mm (l)×65 mm (w).        -   Abundance.—Average.        -   Texture.—Thin. Upper side of leaflet: Semi-glossy and            smooth. Under side of leaflet: Matte and smooth.        -   Color, mature foliage.—Upper Leaf Surface: Green Group 137A.            Lower Leaf Surface: Green Group 138B.        -   Color, juvenile foliage.—Upper Leaf Surface: Yellow-Green            Group 146A. Lower Leaf Surface: Yellow-Green Group 146C.        -   Anthocyanin intonation.—Present. Intonations present Upper            and lower surfaces of juvenile foliage.-   Stipules:    -   -   Size.—12 mm long, 3 mm from distal tip to distal tip.        -   Stipule color.—Yellow-Green Group 144A.        -   Stipitate glands.—Present on upper side and margins.        -   Shape.—Apex: Apiculate. Base: Flat.-   Petiole:    -   -   Length.—Average 16 mm.        -   Diameter.—Average 1 mm.        -   Petiole color.—Yellow-Green Group 144A.        -   Underneath.—Generally smooth with occasional stipitate            glands.        -   Margins.—With stipitate glands.-   Petiole rachis:    -   -   Length.—Average 15 mm.        -   Diameter.—Average 1 mm.        -   Color.—Yellow-Green Group 144A.        -   Margins.—With stipitate glands.        -   Prickles.—Lacking.        -   Stipitate glands.—Lacking.-   Leaflets:    -   -   Size.—Average size of the terminal leaflet is 40 mm (l)×20            mm (w).        -   Shape.—Ovate. Base: Obtuse. Apex: Acute.        -   Margins.—Serrated.        -   Surface.—Upper: Semi-glossy. Lower: Matte.        -   Texture.—Thin.        -   Arrangement.—Odd pinnate.        -   Venation.—Reticulate.-   Hips/seed formation: None observed.-   Winter hardiness: To date, the variety has been grown successfully    in USDA Zones 5-9.-   Disease resistance: Good resistance to Powdery mildew (Sphaerotheca    pannosa) and Botrytis (Botrytis cinerea) diseases under normal    growing conditions.

I claim:
 1. A new and distinct variety of rose plant, as described andillustrated herein.